Memory with regulated ground nodes
AssigneeTaiwan Semiconductor Manufacturing Company, Ltd.
InventorsKuoyuan (Peter) Hsu, Yukit Tang, Derek Tao, Young Seog Kim
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Abstract
Some embodiments regard a memory array comprising: a plurality of memory cells arranged in a plurality of rows and a plurality of columns; wherein a column of the plurality of columns includes a column ground node; at least two voltage sources configured to be selectively coupled to the column ground node; and a plurality of memory cells having a plurality of internal ground nodes electrically coupled together and to the column ground node.
Claims16
A memory array comprising:
- a plurality of memory cells arranged in a plurality of rows and a plurality of columns;
- wherein
- a column of the plurality of columns includes:
- a column ground node;
- at least three voltage sources;
- at least three switches, each of the at least three switches being coupled between the column ground node and a corresponding one of the at least three voltage sources, and each of the at least three switches being controlled by a corresponding one of different control signals;
- and
- a plurality of memory cells having a plurality of internal ground nodes electrically coupled to each other and electrically coupled to the column ground node.
A method of writing to an accessed memory cell of an accessed column of an accessed section of an accessed segment of a memory array of memory cells;
- the memory array of memory cells having at least one segment;
- each memory cell having an internal ground node;
- a segment having at least one section;
- each section having at least one column and at least one row;
- each column having at least three switches and a column internal ground node capable of being electrically coupled to at least three voltage sources through a corresponding one of the at least three switches;
- the column internal ground node of each column being coupled to a corresponding internal ground node of memory cells in the at least one column, the method comprising:
- in the accessed section,
- electrically coupling a first voltage source of the at least three voltage sources to a column internal ground node of the accessed column;
- and
- electrically coupling a second voltage source of the at least three voltage sources to a column internal ground node of an un-accessed column of the accessed section;
- the first voltage source having a first voltage level different from a second voltage level of the second voltage source.
Dependencies are inferred from the claim text.